分层浅海海洋环境噪声场的射线预报方法-声学技术.PDFVIP

23 2 Vol. 23, No. 2 2004 6 Technical Acoustics Jun. , 2004 陈小龙, 范军, 汤渭霖 ( , 200030) : , : ; : ; ; : O427 :A : 1000-3630(2004) 02-007 -05 Ray method for predicting ambient noise field in stratified shallow water CHEN Xiao-long, FAN Jun, TANG We-i lin ( S tate K ey VSN Laboratory, Shanghai Jiaotong University, Shanghai 200030, China) Abstract: Rapid prediction of ambient noise field in complicated stratified shallow w ater that varies both w ith time and location is significant for a sonar system to match its environment. By using a ray method, the noise directionality, noise intensity and spatial correlation function versus depth is ob- tained for profiles w ith isovelocity, negative velocity gradient, positive velocity gradient and arbitrary velocity. T he result show s that ambient noise field in stratified shallow w ater depends closely on the properties of sea bottom and the velocity profile. It is also demonstrated that the ray method is applica- ble to the rapid prediction of ambient noise field in stratified shallow w ater. Key words: stratified shallow w ater; ambient noise; ray method 1 : [ 2] [ 3] , , , , , 0 Harrison [3] , ( CANARY ) , , , , , , ,